package com.jswzc.framework.util;

import com.alibaba.fastjson.JSON;
import net.sf.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpRequest
{

	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			connection.setRequestProperty("Accept-Charset", "utf-8");
			connection.setRequestProperty("contentType", "utf-8");
			// 建立实际的连接
			connection.connect();
			// 获取所有响应头字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet()) {
				//   System.out.println(key + "--->" + map.get(key));
			}
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(
					connection.getInputStream(),"utf-8"));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送GET请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, String param)
	{
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try
		{
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(param);
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(
					new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null)
			{
				result += line;
			}
		} catch (Exception e)
		{
			System.out.println("发送 POST 请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输出流、输入流
		finally
		{
			try
			{
				if (out != null)
				{
					out.close();
				}
				if (in != null)
				{
					in.close();
				}
			} catch (IOException ex)
			{
				ex.printStackTrace();
			}
		}
		return result;
	}


	/**
	 * post 请求，pay17用
	 * @param url
	 * @param para
	 * @param inEncode
	 * @param outEncode
	 * @return
	 */
	public static String post_pay17(String url, Map<String, String> para, String inEncode,
						   String outEncode) {
		// 创建默认的httpclient实例
		CloseableHttpClient httpclient = null;
		HttpEntity httpEntity = null;
		String returnValue = null;
		try {
			httpclient = HttpClients.createDefault();
			// 创建参数队列
			List<NameValuePair> params = new ArrayList<NameValuePair>();
			if (para != null && !para.isEmpty()) {
				for (String key : para.keySet()) {
					params.add(new BasicNameValuePair(key, para.get(key)));
				}
			}
			UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params,
					inEncode);
			HttpPost httppost = new HttpPost(url);
			httppost.setEntity(entity);
			// 设置请求和传输超时时间
			RequestConfig requestConfig = RequestConfig.custom()
					.setSocketTimeout(30000).setConnectTimeout(30000).build();
			httppost.setConfig(requestConfig);
			CloseableHttpResponse response = httpclient.execute(httppost);
			System.out.println("返回code=="
					+ response.getStatusLine().getStatusCode());
			httpEntity = response.getEntity();
			if (httpEntity != null) {
				returnValue = EntityUtils.toString(httpEntity, outEncode);
			}else{
			}
			EntityUtils.consume(httpEntity);
			response.close();

			return returnValue;
		} catch (Exception e) {
			return returnValue;
		} finally {
			try
			{
				httpclient.close();
			} catch (IOException e)
			{
			}
		}
	}


	//post body提交方式
	public static String post_to_Body(String url, Map map) {
		// 实例化httpClient
		CloseableHttpClient httpclient = HttpClients.createDefault();
		// 实例化post方法
		HttpPost httpPost = new HttpPost(url);
		// 结果
		CloseableHttpResponse response = null;
		String content = null;
		httpPost.setHeader("Content-Type" , "application/json");
		try {
			// 将参数给post方法
			String body = JSON.toJSONString(map);
			if (body != null) {
				StringEntity stringEntity = new StringEntity(body , "UTF-8");
				httpPost.setEntity(stringEntity);
			}
			// 执行post方法
			response = httpclient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == 200) {
				try {
					content = EntityUtils.toString(response.getEntity(), "UTF-8");
					System.out.println("content:"+ content);
				} finally {
					response.close();
				}
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return content;
	}

	public static void main(String[] args) {
		String url = "http://demo2.www7soft.cn/milk/pos_doLogin.do";
        //发送 POST 请求
        String sr=HttpRequest.sendPost(url, "login_name=admin&pwd=1");
        System.out.println(sr);
    }
}
